[clang] [llvm] [docs] Add a section on AI-generated content to the developer policy (PR #91014)

[via cfe-commits]

================
@@ -1301,4 +1303,28 @@ to move code from (e.g.)  libc++ to the LLVM core without concern, but that code
 cannot be moved from the LLVM core to libc++ without the copyright owner's
 permission.
 
-.. _LLVM Discourse forums: https://discourse.llvm.org
+.. _ai contributions:
+
+AI generated contributions
+--------------------------
+
+Artificial intelligence systems raise many questions around copyright that have
+yet to be answered. Our policy on AI tools is guided by our copyright policy:
+contributors are responsible for ensuring that they have the right to contribute
----------------
maflcko wrote:

```suggestion
Contributors are responsible for ensuring that they have the right to contribute
```

https://github.com/llvm/llvm-project/pull/91014